Number of parts in all compositions of n into distinct parts.

Terms

a(0) =1a(1) =1a(2) =5a(3) =5a(4) =9a(5) =27a(6) =31a(7) =49a(8) =71a(9) =185a(10) =207a(11) =339a(12) =457a(13) =685a(14) =1421a(15) =1745a(16) =2577a(17) =3615a(18) =5143a(19) =6877a(20) =13439a(21) =15965a(22) =23823a(23) =31983a(24) =45553a(25) =59425a(26) =83549a(27) =139013a(28) =173769a(29) =244803